Type-writing attachment for adding-machines.



w 'PATBNTEfiMAY 14,190'1' LE. B. GRAM.

TYPE WRITINGTATTAOHMENT POEADDIN APPLICATION FILED APR 10, 1906.

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- WITNESSES.

- INVENTOR Edwin B. Gram.

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' 16 gHEnTs -sHE-ET 1,

. PATENTED MAY 14;;1907. )E. 1s.v ORAM. qTYPE WRITING ATTACHMENT FOR ADDING MAO BIN-ES.

15 SHEETS-SHEET 2.

APPLICATION FILED APR.19, 1906.

I/VVE/VTOR Edwin B. Cram.

WITI'VESbLSJ TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLICATION FILED APR.19, 1906.

' ATTORNEYS I v PATENTED MAY 14, 1907. E. B. GRAM.

15 SHEETS-SHEET 3.

No. 853297. PATENTED MAY 14, 1907 E. B. ORAM.

TYPE WRITING ATTACHMENT FOR ADDING MAOHI NBS.

15 SHEETS-SHEET 4.

APPLICATION FILED APR.19,1906.

IIVI/E/VTOR Edwin E. Gram.

No. 858,297. v HPATENTED MAY 14, 1907 .E. B. GRAM.

TYPE WRITING ATTACHMENT FOR ADDING: M

A'GHI N- APPLICATION FILED 4PR.19.'1906- I v WITNESSES:

INVENTOR M y/ Edwin B. Cram.

7 4 from/Era,

15 SHEETSSHEET 5.

No. 853,297.. PA-TENTED MAY 14, 1907.

E. B. GRAM. T YPE WRITING ATTACHMENT FOR ADDING MACHINES. APPLICATION FILED APR.19,1906.

, 15 SHEETSSHEET 6.

a '5 f INVENTOR A Edwin B. Gram,

W A H @QH n 4 .HQH @NH HQ H HIIIIIIMHIIII /7 Arum 5m.

' 1 PATENTED MAY l4,-:190'7. B. B. GRAM.

TYPEWRITIN-G ATTACHMENT FOR ADDING M AGHINES.

APPLICATION FILED APR. 19; 1906.

' 15 SHEETS-SHEET 7.

l/VI/E/VTOR Edwin B. Cram.

No. 853,297. PATENTED MAY 14, 1907.

v E. B. ORAM.

- TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLIOATIbN FILED APR. 19, 1906.

15 SHEETSSHBET 8 INVENTOR Edwin B. Cram;

Arrow/5m, I

. E PATENTED MAY 14,1907.-

- ORAM. TYPE WRITING ATTACHMENT FOR ADDING MAOHIN 15 SHBIQTS-LSHBET 9.

APPLICATION FILED APR.19,1906.

m mum a IIIIIIIIHII II I IIIIIIIIIIH I ll llWE/VTOR ATTORNEYS.

dwin B. Gram BY J mu I IIW WM] v WIT/115 858;

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No. 853,297. PATENTED MAY 14, 190' E. B. CRAM. 7

TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLICATION FILED APR.19, 1906.

15 SHEETSSHEET 11.

PATENTEJJ MAY 14, 1907v B; GRAM. V TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLICATION FILED APR.19,190 6.

15 SHEETSSHEET 12.

INVENTOR Edwin Ba Gram.

W/TgVESSES:

No. 853,297. PATENTED MAY 14, 1907.

- E! B- URAM.

TYPE WRITING ATTACHMENT FOR ADDING MACHINES. APPLICATION FILERAPRJQ, 1906.

15 SHEBTSSHEET l3.

WITNESSES: UVVENTOR Edwin B. Gram.

ATTORNEYS No. 853,297. PATBNTED MAY 14, 1907. E. B. ORAM.

"TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLICATION FILED APR.19,1906.

15 SHEET$SHEET 1 1 \llllllllllllllllllllllllllll W/TNESSES: QINVENIOR W Edwin B. Cram.

No. 853,297. PATENTED MAY 14:,11907v E. B. ORAM. 7

TYPE WRITING ATTACHMENT FOR ADDING MACHINES.

APPLIOATION FILED APR.19,1906.

l5 SHEETS-SHEET 1E.

I 155 Fig .3 l

I A '75 I I g lmuu 136 AAAAII H? 7 6 INVENTOR WITNESSES.

/ n v Edgin 13.0mm.

w/yif ATTORNEYS.

UNITED STATES PATENT ()FFIOE.

lClYiVlN BEECHER CRAM, OF ST. LOUIS, MISSOURI, ASSIGNOR T CHAR f \YlilT- ING MACIIlNE COMPANY, OF ST. LOUIS, MISSOURI, A tTOhlOltAllOh' ()F MLSSOU R1 TYPE-WRITING ATTACHMENT FCR ADDlNG-MACHINES.

Specification of Letters Patent.

Patented May 14, 1907'.

Application filed April 19, 1906. Serial No. 312,674.

Be it known that i, Enwix Bnncnnn CRAM, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful lype\Vriting Attachment for Adding-Machines, of which the following is such a full, clear, and exact description as will enable any one skilled in the art to which it apperl0 tains to make and use the same, reference being had'to the accompanying drawings, forming part of this specification.

My invention relates to improvements in typewriting attachments for adding ma 1 5 .chines, and more particularly to that class of attachment shown in Letters Patent No. 761,948, granted to me June 7th, 1.904, the. general principle and mode of operation in the present attachment being very similar to 20 that in the patent above referred to. Inthc present instance, however, the typewriting mechanism in place of being operated by a pivoted lever as in the previous application, is operated by keys in amanner similar to the 2 5 ordinary standard forms of t ypewriter.

in the accompanying drawings, which illustrate. an attachment made in accordance with my invention, together with an addingmachine to which the same is applied, Figure 0 1 is a top plan view on a reduced scale showing substantially the complete. mechanism; Fig. 2 is a side view also on a reduced scale, a portion only of the attachmentbeing shown: Fig. 3 is a top plan View of the rear portion of 5 the parts shown in Fig. 2, Figs. 4, 5 and (S are two end views and a side view respectively, 1

showing the mechanism for controlling the line spacing; Fig. 7 is a rear view of a port ion of the framing of the machine; Fig. 8 is a sec- 0 tion on the line 8-8 of Fig. 9; Fig. t) is a vertical central section through the typewriting mechanism proper; Fig. 10 is a side elevation of the typewriting mechanism and a portion of the adding machine, the typewriting met-h- 45 anism being swung out of normal position; Fig. 11 is a vertical cross-section; Fig. 12 is a vertical section through the typewriting mechanism showing the manner of snfting from lower to upper case; Fig. 12 i.-.' :1 de- 50 tail view showing a modification; Fig. 13 is a front elevation showing the arrangement of the type bars and key bars; Fig. 14 isa horizontal section through a portion of the. ma-

i l l l l i l l l l l i l 'tion shown in Figs. 15

chine showing the arrangement of the type bars; Figs. 15 and 16 are detail views showing the connection between the key bars and type bars; Fig. 16 showing the parts in a different position than Fig. 15; Fig. 17 is an enlarged sectional view of the pivotal connecand 16; Fig. 18 is a sectional view showing a detail of construc tion; Figs. 1.) and 20 are enlarged detail views of the tension device for the letter spacing; Figs. 21 and 22 are enlarged sectional views of a portion of the ribbon feed mechanism; Fig. 23 is an enlarged sectional view of one of' the bearings shown in Fig. 26; Fig. 24 is a side elevation of a portion of the mechanism shown in Fig. 19; Fig. L5 is a sectional View showing the feed pawl for line spacing, together with the mechanism for actuating the same; Fig. 2c is a top plan view of some of the parts shown in Fig. 25; Fig. 27 is an enlarged detail view of one of the limit stops shown in Fig. 25; Fig. 28 is an end view of the feed pawls; Fig. 29 is top plan view of the feed pawl; Fig. 30 is an enlarged top plan view of the mechanism for controlling the letter spacing, together with some of the mechanism for controlling the ribbon feed, and Figs. 31 and 32 are a vertical section and bottom plan view, respectively, of the ratchet mechanisms for the ribbon feed.

Like marks of reference refer to similar parts in the several views of the drawings.

(Fig. 2) represents a base upon which is carried the adding mechanism 41, and the t ypewri ting mechanism to be hereinafter particularly described. The addii'ig mechanism 41 may be of any suitable type. In thedrawings .1 have illustrated the type known as the The "Burroughs adding machine. adding machine 41 is rigidly seeured to the base 40 by means of screws 42; The base 40 extends rearwardly from the adding machine 41 and is'provided with uprights 43, which carry a cross-bar or rod 44. This cross-bar rod 44 forms the guide for a laterally movable frame 45 carrying a second bar or rod 46 upon which the typewriting mechanism moves bodily, will be hereinafter described. The frame 45 is provided with rolls 47,-which run upon the bar 44, so as to reduce friction. The frame 45 is provided with two forwardly extending U-shaped 1c 5 arms 48, which are secured by means of A K erable force. 5

screws 49 to the adding machine carriage 50. Owing to this construction, it will be evident that the frame will move in unison with the platen mechanism 50 of the adding machine 41. The frame 45 and attached parts I term the typewriter carriage. As this carriage 50 of the adding machine forms no part of my invention except in so far as it co-operates with the typewriting mechanism, the same will not be described in detail.

51 is a finger piece, by meansof which the addding machine carriage 50 may be released to move the same laterally of the adding machine 41..

In order to provide means for controlling the line spacing, l. secure to the right hand. arm 48 a curved guide or cam52, which arm or cam is adapted to control a centering pawl 53 engaging with a star wheel 54 rigidly secured to the paper roll or platen 55 of the adding machine carriage 50. It will be understood that the paper roll 55 is adapted to be swung from the position shown in full, lines in Fig. 2 to that shown in dotted lines, as fully set forth in my prior patent heretofore referred to, so that when the said roll is in the first position, it will co-operate with the adding mechanism 41, and when in its second'position it will co-operate with the typewriting mechanism. The centeringpawl 53, when the roll 55 is in position to co-operate with the adding machine, is held out of engagement with the wheel 54, as shown in Fig. 4, bymeans of a spring 56 secured to the rear end of said pawl and provided with a clip 57 embracing the curved arm or cam 52. This arm or cam 52 is of such shape, however, that when the paper roll is thrown into its second position, as shown in Fig. 5, the spring 56 will be caused to hold the centering pawl 53 in engagement with the star wheel 54 on the roll 55, so that the roll cannot be rotated without the application of consid- The roll can be rotated, however, by means of the milled head 58 shown in Fig. 8, sufficient force being applied to overcome the pressure of the spring 56.

.The frame 45, in addition to the cross rod v46, hereinbefore referred to, also carries a feed rack 60 (Fig. 1) supported onshort rearwardly extending arms 61 and a bearing bar 62 carried on forwardly extending arms 63. The frame 45 also carries near its right hand end a rearwardly extending post 64, (see also Figs. 10 and 19) which supports the tension mechanism for letter spacing, and also a post 65 to which is pivoted a pawl 66 co-operating' with a ratchet wheel'67 mounted on the post 64 and forming part of the tension mechanism. This ratchet wheel 67 has rigidly secured to it a spiral-shaped member 68, to which is attached one end of a strap 69, the opposite end of which is attached to the movable typewriter base, as will be hereinafter fully set forth. The spiral shape of the member 68 serves to equalize the pressure of the spring 70, one end of which is attached to the member 68 and the opposite end to the post 64.

The. cross-rod 46 carried by the laterally movable frame or carriage 45 is surrounded by a hollow casting 72, shown in detail in Fig. 30. This casting 72 is provided with wheels 73 which bear upon the upper side of the rod 46, as also shown in Fig. 12. Proiecting rearwardlvfrom the casting 72 is an L-shapeu arm 74, to which is secured the end of the strap 69 hereinbefore described. The casting 72, together with the attached parts having the same general movement, I. term the typewriter base, and as will appear, these parts move in unison with the typewriter base 45, and also have independentlateral movement thereon. Pivoted on bushings 75 in the ends of the casting 72 are a pair of plates 76. These plates 76 of course move laterally of the machine, together with the casting 72, for securing letter spacing. They also form, together with a connecting cross-bar 77, a frame work which carries the letter spacing andribbon feed mechanism, except such portion of said mechanisms as is carried by the frame 45 and the hollow casting 72, above described. The plates 76 and attached parts I term the typewriter main frame, or simply the typewriter 'rame. The type-writing mechanism proper is carried. by plates 78 slidingly connected on the inner sides of the plates 76. The plate 7 8 and attached parts 1 term the typewriter auxiliary frame. The casting 72 is provided with a downwardly and forwardly projecting arm 79 having at its forward end a roller 80 hearing on the upper edgeof the cross-bar 62, and a bearing block 81 (Fig. 25) bearing on the lower edge of said cross-bar. The casting 72 is thus prevented from rotating on the rod 46, but moves laterally on the rollers 73 bearing on the said rod 46 and the roller 80 bearing on the cross-bar 62. The arm 79 is also provided near its forward end with a bearing surface 82 upon which rests the cross-piece 77 when the typewriting mechanism is in its normal position. In order to provide a stop for the typewriting mechanism when it is swung into the position shown in Fig. 10, 1 form on each of the side plates 76 a rearward projection 84, best shown in Fig. 9, which is adapted to strike the rack bar 66 and thus limit the movement of the parts around the shaft 46.

Referring now more particularly to F 9, l0 and 12, the sliding connection between the side plates 78 and the plates 76 is obtained as follows: Journaled in upward extensions of the plates 76 is a shaft 85 which passes through slots 86 in the side plates 78. This shaft 85 is provided with downward extensions 87 (see also Fig. 1]) provided at their lower ends with pins 88 passing through lIO ' so that when the shill key .33 is depressed.

the plates 78 will be moved toward the rear ol the machine. As the plates 78 carry all'ol' the key bar and type bar mechanism, it. will be evident that the said mechanism will be shifted in the usual manner to change lrom lower to upper case letters. The rear and upper edges 01' the side plates 78 are connected by cross plates 96 and 97, to the 1' ar ol which is secured a knile edge 18 acting as a lulcrum lor the key bars 99. The key bars are provided with the usual keys 1()(). 101 are springs attached at one end to the key bars 99 and at the other to the plate 96. Connecting the side plates 78 is a cross piece 102, to which is secured a segmental part 103 for carrying the type bars. The part 103 is L-shaped in cross-section, as shown in detail in Figs. 15, 1.6 and 18. The part 103 is provided with a cover-plate 104, between which and the part 103 are secured the U-shaped type bar hangers'105, by means ol screws 106. Between the ends of each of the U- shaped type bar hangers 105 is pivoted a type lever 107. At 108 each ol' the type-levers 107 is provided with a double type head 109, so that each type. bar prints two characters by the shifting ol the type mechanism in the manner hereinbelore described. Each of the type levers 107 is connected to its corresponding key lever 99 by a rod 110, the lower end of which .is pivoted to the type bar at 111, and the upper end of which is pivoted to the key bar by a stud 112 passing through an opening in the said key bar, as shown in detail in Fig. 17. The stud 112 is retained in position in the opening of the key bar 99 by means of a spring 113 riveted to the lower endof a turn-buckle 114 carrying the said pin 112 and bent up against the side of the key bar, as shown in Fig. 17. 'lhe turn-lnickle 114 receives the threaded upper end ol the rod and servesto adjust the length of said rod. A lock nut 115 prevents movement between the turnbuckle 114 and the rod 110 after the pr [per adjustment is secured. The type bars 107 when in their normal position rest against a curved support 116 carried by the side plates 78. It will be evident from Fig. 18 that the connection between the rods 110 and the type bars 107 is such that the said rods 111) act upon the bars at an angle ol about 459, both in starting the movement to strike the type and in returning the type bars to normal position, sothat in both cases a'l'avorable position is insured.

In order to leed the casting 7; and attached parts lor letter spacing. 1. provide the said casting 72 with a pair o1 downwardly and lorwardly projecting lugs 120, between which is pivoteda short rock shalt 121, shown 11]. detail in Figs. 2b and 3t)v 'lhe pivotal connection between the lugs :20 and the rock shatt 122 is obtained by means ol adjustable ply ot points 12] held in position by screws "123, as shown in detail in Fig. 2'3. Projectingrearw-ardly lrom the rock shalt 121 is an arm 124 carrying a lixed leed dog 125 and a pivoted leed dog 121') controlled by a spring 127, said leed dogs 125 and 126 being adapted'to alternately engage with the lced rack (it). arm 12% is held in normal position, so that The the )ivoted. do 126 will en a e with the rack by means of a spring 128 (Fig. 25), secured at one end to a pin 129 on a short loiward projection 12.30 on the rock shall 121, and at the other to a pin 131 in the arm 79 hereinbelore described. The projection 131) is also provided with a set screw 15.12 adapted to bear against the lower edge ol the said arm 72) and thus limit the upward movement ol the projection 30. it will be evident that each time the rock shalt 121 is operated the 'asting 72 and attached parts will be led one step toward the right. The rock shalt 121 is also provided with rearward extensions IIH carrying laterally projecting arms 135. Bearing on the upper edges ol the arms 135 near their outer ends are inverted U-shapcd menibcrs 136 carried by rods 13? pivoted to a universal bar 138 passing beneath all the key bars 9t) and also beneath the space bar levers 139 carrying the usual space bar Ht). The universal bar 138 is carried by levers l-ll pivoted to-the plates 78 and 1 12. The lower ends ol the rods 13? work in guides I13; carried by the bar 102 hereinbel'orc. described. It is evident that as the rods 13? are supported by parts carried on the movable plates TS. the said rods will move toward and l'rom the rear ol the machine when the hill key .12. is operated. 'lhe shape ol the members mo allow this to be acconiplislwd without losing connection with the arms 133. as will be best seen by relerence to Fig. 12. 'lhe LJ-shapcd members 136 are each provided with a pin 144 bearing on an arm 145 rigidly secured to a rock shalt Ht). which rock shalt is secured in brackets 1-1. on the rear lace olthe crossbar 77. The rock shalt 1113 is provided with a pair ol urved arms 11%. the lorward ends ol which engage the under side oi rearward projections on ribbon carriers 11%) pivoted to brackets 151) on the lront lace ol the cross-bar TT. 'lhe ribbon carriers 14!) are normally held in the position shown in Fig. 9 by means ol coil springs 1:31 secured at one end to the rearward extensions ol said carriers and at the other to a pin 152 in the brackets 130. It will be evident. however. that when the rods 135 are depressed by the movement ol the key bars 90, the ribbon carriers 149 will i be thrown into the position shown in Fig. 12,

so as to move the ribbon, which will be hereinafter described, into proper position between the type heads and the paper roller. right hand arm is provided with a linger-piece 155, by means ofwhich the. rock shaft 121 can be rocked to a greater extent than in the ordinary operationof the machine, so as to release both the dog 1.25 and the dog 126 from the feed rack 60, so that the casting 2 and attached parts forming the typewriter base can be freely moved along the rod 46. The linger piece may be in the form shown in Fig. 8 in which the arm bent forward, or it may be in the form shown in I 30 in which the arm 135 is not bent, the form of the finger piece being of no importance. In order to limit this movement of the rock shaft 121, the casting 72 is provided on its rear face with a bracket 156 containing a set screw 157 against which the arm 12-1- is adapted to strike.

160 are the ribbon spools, each of which is secured to a shaft 161 carried on brackets 162 on the side plates 76. Secured to the rear end of each of the shafts 161 is a beveled gear 163. Sliding. journaled in the plates 76 is a shaft 164 provided with. two beveledgears 165, each adapted to mesh with one of the beveled gears 163. The shaft 164 is provided with two circumferential grooves 166. A cross-bar 167 extending between the plates 76 is provided. with a spring detent 168 adapted to engage with one or the other of the grooves 166 as best shown in Fig. 8. When the detent 168 engages with one of the grooves 166, "the wheel at the right hand end. of the shaft 164 will engage with the gear 163 of the right hand spool 160, while when the detent 168 is in the other of the grooves 166, the wheel 165 at the left hand end of the shaft 164 will engage with the wheel 1.63 of the left hand spool 160, thus providingreversing means for the inking ribbon. In order to provide for winding the ribbon by hand the shaft 164 is provided with a crank arm -1 6.). The shaft 164 passes through two of the arms of a triple bracket 170, between which is a sleeve 171 surrounding the said shaft .16 1 and adapted to slide on the said shaft, but incapable of independent rota tion. This is obtained as shown in detail in Figs. 21 and 22, by providing the said shaft 164 with a slot 172 and providing the sleeve 171. with a set screw 173 projecting into the slot 172. The sleeve 17]. is provided with a beveled gear 1.74, which meshes with a beveled gear 175 carried on a shaft 176 passing through a rearwardly and downwardlyextending portion of the bracket 170 and through a bracket 177 carried on the under side of said first named bracket 170. The shaft 176 is provided on its end with a beveled gear wheel 178, which normally meshes l l i l y motionwill not be communicated, as the deg 1 with a small beveled gear 179 carried on a shaft 180 journaled in a projection on the rear face of the casting 72. When the typewriting mechanism is swung .on the shaft 46, however, the wheel 178 will swing away from the wheel 17 9, as indicated by the dotted lines in Fig. 12. The lower end of the shaft 180 has loosely mounted on it a toothed wheel 181 meshing with the feed rack 60. This wheel 181 has rigidly secured to it a ratchet wheel 182. Surrounding the lower end of the shaft 180 and rigidly secured thereto is a cup-shaped member 183 provided with a pawl 184 engaging with the ratchet wheel 182. The pawl is held in position by means of a spring 18. It is evident from this construction that when the casting 72 and attached parts are moved in one direction, the rotation of the wheel 181 will be communicated tothe shaft 180, while if said parts are moved in the opposite direction the 184 will simply slip over the teeth of the ratchet wheel 182. Owing to this the ribbon 186, which is wound upon the spools 160, will be fed forward when the typewriting mechanism is moved. toward the right hand of the machine, but when returned toward the left the said ribbon will not be fed. In order to prevent injury to the parts in case a tooth on the wheel 17 8 should strike against a tooth of the wheel 179 when the two are swung into mesh, I may provide for play between the said wheels as shown in Fig.12, and surround the shaft 176 between the one end of which bears against the bracket 170 and the other against a collar 188 rigidly secured to the shaft 176. The wheels 178 and 179 are thus held. in mesh only by the pressure of the spring 187, and, consequently, no injury can occur to the machine through the failure of the said wheels to properly mesh when the typewriting mechanism is swung into normal position.

In order to hold the rock shaft 85 in normal position, I provide two springs 190 (Fig. 8), one end of each of which is attached to a pin 1.91 in the downward extension 87 of the said rock shaft 85, and the other end to a bracket 192 carried on the cross bar 167. The lower end of the extensions 87 will thus be held in their forward position so as to move the plates 87 to their forward position, and, consequently, in the normal position of the parts theinner type on the type heads 109 will be in position to strike the printing point on the paper roll 55. In order to hold the universal bar 138 in its normal raised position, I provide the said part with a pair of "brackets 193 (Figs 11 and 12), tothe upper end of each of which is secured one end of a l coil spring 1 94, the opposite end of whichis sel cured to a pin 95 in one of the side frames 78. l In order that the machine may be used brackets 1.70 and 177 with a coil spring 187,-

'2 and 10. It will be seen with the ordinary strip of narrow paper wound upon a roll 111 place of wide or sheet paper, the platen mechanism is provided I with downwardly extending arms 196,- carrying the paper rod 197, as is best seen in Figs. that the shape of the arms 48 is such as to allow ready access to the paper roll 197 when the typewriting mechanism is thrown back, as shown in Fig. 10.

The operation of my machine is as follows: The normal position of the various parts of the machine is shown in top plan View in Fig. 1 and in vertical section in Fig. 9 When the parts are in this position, the carriage 50 of the adding machine 41 may be released by means of the finger piece 51, so that the said carriage may be moved laterally of the add ing machine to bring any desired part of the roll in position to be operated on by the printing mechanism of the adding machine. inasmuch as the carriage. 50 of the adding machine is rigidly secured by the screws 49 to the U-shaped arms 48, the entire typewriting mechanism will be moved along the guide rod 44 of the main frame 40 in unison with the said adding machine carriage. When the parts are thus brought into the desired lateral position, they are locked in place by releasing the finger piece 51. if it is now desired to cause the typewriting mechanism to print on the paper roll 55, it is swung from the position shown in full lines in Fig. 10 to that shown in dotted lines. By swinging the plates 76 and the attached parts, forming the typewriter frame, into the position shown in Fig. 10, the printing upon the roll 55 will be visible. The parts may now be swung in their normal position and the typewriting mechanism positioned rela tively to the paper roll 55 by depressing the finger piece 155, so as to release both dogs 125 and 126 of the letter spacing mechanism from the rack 60. As soon as the desired position is reached the typewriting mechanism is actuated by means of the keys 100. When onetof the keys 100 is depressed the corresponding key bar 99 is moved with the knife edge 98 as a fulcrum. The movement of the key bar 99 is communicated through the connecting rod 110 to the corresponding type bar 107 so that the said type bar is swung on its pivot 108 so as to bring one of the type on the type head 109 into contact with the printing point of the paper roll 55. -If the shift key 97 is in its normal position the inner type of the head 109 will be brought into contact with the printing point on the roll 55. If, however, the shift key 97 is depressed, as shown in Fig. '12 of the drawings, the rock shaft 85 will be actuated and the plates 79. with all the attached parts, forming the auxiliarytypewriter frame, moved toward the rear, so that the outer type on the head 109 will be brought into contact with the print shaft 46.

. contact of the key I ing point on the roll 55. Prior to the conitact of the type with the roll, the universal bar 138 will be moved dowmvard against the tension of the spring 194 by reason of the mi 99 with the saidunivcrsal bar 138. The movement of the universal bar 135 will be connnunicatml through the connecting rods 137 and the inverted U- shaped pieces 136 to the cross bar 135. At the same time the pins 144 on the parts 136 will come into contact with the arms 1 45 and rock the shaft 146 so that the forward ends of the curved members 148 carried by the said rock shaft 146 will actuate the ribbon carriage 149, so as to move the ribbon 180 into position between the type heads 109 and the roll 55, as shown in Fig. 12. The ribbon carriers 149 are normally in the position shown. in Fig. 9, and are held in this position, except when actuated as above described, by means of the springs 151, thus leaving the upper portion of the roll 55 uncovered,-so that the printing may be observed by swinging back the type-writing mechanism on the rod 46. The movem nt of the cross bar 135, as above described, by the depression of the key bar 99, rocks the shaft 121 on its pivots 122, and thus disengages the pivoted dog 126 from the teeth of the rack 60. Before the pivoted dog 126 leaves contact with'the teeth of the rack, however, the fixed d og 125 comes into engagement with the said teeth so that there is no movement of the printing meehan ism along the rack during the downward movement of the arms 135. As soon as the movable dog 126 is out of engagement with the teeth, it will be moved forward by the spring 127, as shown in Fig. 9, so as to be in position to engage rack. Upon the return movement of the arms 135 the rock shaft 121 will resume its normal position so as to bring the pivoted dog 126 into engagement with the next tooth of the rack 60. As soon as this occurs the tension of the spring acting through the strap 69 will pull the entire typewriting mechanism toward the right until'the movable dog 126 is brought into its normal position, as shown in Fig. 26, so that the printing mechanism is moved toward the right the distance of about one letter space. The de pression of the finger piece 155 moves the rock shaft 121 until its arm 124 comes in contact with the stop screw 157, so. that both the dogs 125 and 126 are moved ontof engagement with the-teeth of the rack 60 and'the entire mechanism may be moved along the Whenever the printing mechanism is moved toward the right the movement of the ratchet wheel 181 will be communicated through the ratchet wheel 182 and dog 184 to the cup 183 rigidly secured to the-upright shaft 180, and, consequently, ifthe' with the next tooth of the tted through the wheels 

